- Definitions|2
- Thesaurus|3.2k
- Abbreviations|0
| well-versed | |
| overprotective | |
| attentive(adjective, careless, careful, considerate, concentrating) | |
| shy | |
| thoughtful(adjective, happy, careless, careful, caring) | |
| careful(adjective, false, loose, reckless) | |
| prudent | |
| smart | |
| cautious(adjective, careless, careful, reckless, guarded) | |
| heedful(adjective, careful) | |
| observant(adjective, careless, careful, unobservant) | |
| chary(adjective, careless, careful, cautious) | |
| considerate(adjective, mean, hard, inconsiderate) | |
| wary(adjective, careless, certain, careful, cautious) | |
| curious | |
| focused | |
| gingerly | |
| grateful | |
| intelligent(adjective, feature, speech, conduct, dullness) | |
| kind |
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| APA | Smart Define. (2016). heedless thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/heedless/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "heedless thesaurus" https://smartdefine.org/heedless/thesaurus/antonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, heedless thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/heedless/thesaurus/antonyms>. |
| MLA | Smart Define. "heedless thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/heedless/thesaurus/antonyms> |